No. Please note that the hotel rooms often feature a water dispenser which delivers both cool and hot potable water. However, some hotels have no water dispenser but are instead equipped with a water heater or thermos. You can use the water heater to boil water or use the water directly from the thermos. If the water in the thermos has run out, you can ask a waiter to refill it. In some cases, four- or five-star hotels may supply high-quality mineral water for free or for a minimal charge. The tap water in the hotels can be used to brush teeth.